Gracey & Associates Hire and Calibration

Sound Intensity Measurement

We hire sound intensity meters and probes, supplied by the leading manufacturers and have the most comprehensive range in the UK.

All our meters, microphones, accelerometers etc., are delivered with current calibration certificates, traceable to UKAS. Our ISO 9001 laboratory is audited by British Standards and we are Sponsor Members of the Institute of Acoustics.

Gracey & Associates are an independent organization with over 30 years experience of sound and vibration solutions.

Hire is the cost effective solution with overnight access to the latest and best instrumentation.

Gracey & Associates   01933 624212

BSI accreditation for instrument hire and calibration

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Sound Intensity

This page deals with sound intensity measurements which have several useful applications. Sound intensity probes are directional, so you can isolate and measure noise sources in reverberant noise fields, i.e. factories, plant rooms etc. For example you can 'rank' various sources of noise from a pump attached to an electric motor or gearbox.

Using sound intensity techniques you can make building acoustics measurements, look for flanking transmission paths or acoustic leaks. You can also use sound intensity for sound power measurements

Sound level meter microphones are omnidirectional, by design, so the traditional measurement of sound power involved expensive anechoic or fully reverberant test rooms. Sound intensity probes, on the other hand, enable you to derive the sound power from the measured intensity of a noise source in the work place *.

Sound intensity power measurements generally fall into two categories, the survey and the precision method - see BS EN ISO 9614

Note * It is assumed that the noise source does not absorb any acoustic energy from the sound field. This is fulfilled when the source is made of acoustically reflective materials - most cases. It can also be shown that the influence from sources outside the measurement surface then can be excluded.

B&K 2260E   Sound Intensity Meter

£ 42 a day *

Bruel & Kjaer hand-held 2260 meter with the BZ 7205 intensity software.

The combination of 2260E and the 3595 Sound Intensity Probe Kit enables sound intensity measurements of Sound Reduction Index to ISO 717-1 and flanking investigations

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B&K 3595   Sound Intensity Probe Kit

£ 27 a day *

The Bruel & Kjaer 3595 is a two-microphone probe kit for measuring sound intensity.

Designed for use with 2260E Hand-held Sound Intensity System, the probe set includes the 1/2" Sound Intensity Microphone Pair Type 4197 enabling 1/3-octave centre frequency measurements.

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B&K 4297   Sound Intensity Calibrator

£ 11 a day *

Designed for use with the type 2260E Sound Intensity Meter and the type 3595 Sound Intensity Probe Kit

For on-site
sound-pressure calibration
pressure-residual intensity index verification


more details

Nor 840   Sound Intensity and multi-function analyser

£ 40 a day *

Type 0 real time analyser - combines the advantages of a full performance laboratory analyser with the flexibility of battery power for field applications.

Single and multi spectra measurements
Octave, 1/3, 1/12 and 1/24-octave + FFT
A : B : C, Linear, human vibration plus user defined networks.
0.1 Hz to 20 kHz frequency range in both channels
Time constants selectable from 1/16 seconds
Sound Intensity software built in - see also the GRAS 50AI intensity probes
more details

GRAS 50AI   Sound Intensity Probe

£ 20 a day *

The GRAS 50AI is durable and easy to use probe that fully complies with the requirements of IEC 1043 for Class 1 sound intensity probes.

The sound intensity probe includes a set of 1/2" intensity microphones type 40AI, with spacers, adaptors, preamplifiers and a remote control handle to control the complete data acquisition process from the probe handle, when used with the Nor 840 analyser.

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GRAS 51AB   Sound Intensity Calibrator

£ 8 a day *

For phase and level calibration of both 1/2" and 1/4" sound intensity microphone pairs.

The GRAS 51AB may be used for residual intensity testing, level and the particle velocity calibration as specified in BS EN 61043

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GRAS 40AK   Microphone Set - Sound Intensity

£ 12 a day *

The GRAS 40AK set includes two phase matched 1/2" intensity microphones, spacers and 1/4" preamplifier adaptors.

The microphones have a free field response optimised for use in face to face configuration intensity probes and have high sensitivity to enable low level measurements.

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GRAS 12AA   Microphone Power Supply - dual channel

£ 5 a day *

GRAS dual channel, battery operated power supply for GRAS, Norsonic and other compatible preamplifiers with Lemo 1B 7-pin connectors.

Ideal for use with GRAS 41AL outdoor microphone systems when the sound level meter to be used does not have Lemo preamplifier inputs and / or polarization voltage supplies.

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Gracey & Associates   01933 624212

BSI accreditation for instrument hire and calibration

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